.TimedOutException happens long after trans-timeout-seconds value
I'm using WL 7.0 and have <trans-timeout-seconds>5</trans-timeout-seconds> in the
weblogic-ejb-jar.xml for a remote stateless session bean. The TimedOutException
is thrown and says "Transaction timed out after 5 seconds" but only after the
EJB returns control to the calling class. I set up a test in the EJB to loop for
15 seconds and then return control. When it returns control the calling class
gets the exception. Any idea on what's going on? Below is the weblogic-ejb-jar.xml
<?xml version="1.0"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
<weblogic-ejb-jar>
<description>Common WebLogic Descriptor</description>
<weblogic-enterprise-bean>
<ejb-name>PricingSessionEJB</ejb-name>
<transaction-descriptor>
<trans-timeout-seconds>5</trans-timeout-seconds>
</transaction-descriptor>
<jndi-name>PricingSessionEJB</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
That means you need asynchronous prosessing not synchronous calls to EJBs.
You should instead use JMS.
hth
sree
"mike mcgreevey" <[email protected]> wrote in message
news:40bc6f03$1@mktnews1...
>
So what is the purpose of the timeout if it doesn't do it until thetransaction
is really done? My application is for a web-service, and I wanted to abortthe
process if it takes longer than a certian amount of time.
"Slava Imeshev" <[email protected]> wrote:
"mcgreevey" <[email protected]> wrote in message
news:40b227ac$1@mktnews1...
I'm using WL 7.0 and have<trans-timeout-seconds>5</trans-timeout-seconds>
in the
weblogic-ejb-jar.xml for a remote stateless session bean. The
TimedOutException
is thrown and says "Transaction timed out after 5 seconds" but onlyafter the
EJB returns control to the calling class. I set up a test in the EJBto loop for
15 seconds and then return control. When it returns control the callingclass
gets the exception. Any idea on what's going on?TX timeouts are handled when an exec thread [that executes bean's logic]
finishes
its execute request. So if you set timeout to 5 seconds and execution
takes 10 minutes,
timeout handling logic identifies that a TX has taken longer thanconfigured
value *in 10
minutes* and will rollback the TX as timed out.
It's because in Java there is no way to stop a running thread forcedly.
HTH
Regards,
Slava Imeshev
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How to find optimal timeout period for trans-timeout-seconds element.
we are using Weblogic 7.0 Integration Studio,in one workflow we got "weblogic.transaction.internal.TimedOutException" and the exception text is "Transaction timed out after 1089 seconds".
Presently we are using timeout period as 1089 seconds.
On what basis the timeout period for transactions is specified, i.e. how the value of the <trans-timeout-seconds> is set in weblogic-ejb-jar.xml file?
Is there any method to find the optimal value?You should base this on the average time your transaction typically takes. It would have to factor in the type of backend systems that you are connecting too, the type of work you are doing and any network etc issues.
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It then calls the CMP to delete the record from the table. Is this a good approach?
I could not find another way to do
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secs and then deletes the
record. Let me know if there is a better approach to this.
When i do the above, I use a "Trans-timeout-seconds" in weblogic-ejb-jar.xml file
but it doesnt look like
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descriptor. I found
this thread in the forums which says the same thing
http://newsgroups.bea.com/cgi-bin/dnewsweb?utag=&group=weblogic.developer.interest.jms&xrelated=7038&cmd_thread_next.x=44&cmd_thread_next.y=11
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TIA
RajI was using it that way but thought that was also against the specs.
That was the reason we dropped that idea and went in for the Thread.sleep
And is the trans-timeout-seconds tag (in weblogic-ejb-jar.xml) is not read by the
container.
Is there a fix for WL 6.1?
Thanks
Raj
"Emmanuel Proulx" <[email protected]> wrote:
In theory you're not supposed to manage threads in EJBs. This includes
starting, stopping, suspending, resuming, changing priority, etc.
I suggest you use a server session pool (JMS) instead.
One approach I personally think is acceptable, is to manage your threads
separately (managed using a Singleton class, created using a startup class)
from the MDB. This way your MDB isn't managing threads directly. This is
a
gray area.
Emmanuel
"Raj" <[email protected]> wrote in message
news:3cf26fdd$[email protected]..
We have a MDB which processes requests from a queue, and after a specificstate is
reached, waits for 2 mins
and deletes a record from a table. This table is wrapped around by a CMP.
In the MDB, We have a Thread that sleeps for a specific amount of timeafter the
specific state is reached.
It then calls the CMP to delete the record from the table. Is this a goodapproach?
I could not find another way to do
this. We tried creating an external thread pool and kick off the threadfrom within
the EJB but am not
sure if it would violate the specs. So the simplest "Thread.sleep" happensfor 2
secs and then deletes the
record. Let me know if there is a better approach to this.
When i do the above, I use a "Trans-timeout-seconds" inweblogic-ejb-jar.xml file
but it doesnt look like
its reading it. Its using the JTA Transactiontimeout but not the one inmy
deployment
descriptor. I found
this thread in the forums which says the same thing
http://newsgroups.bea.com/cgi-bin/dnewsweb?utag=&group=weblogic.developer.in
terest.jms&xrelated=7038&cmd_thread_next.x=44&cmd_thread_next.y=11
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Transaction timeout seconds and suspended trsnactions.
All,
Does the <trans-timeout-seconds>10</trans-timeout-seconds> in weblogic-ejb-jar.xml
apply to transactions that are in a suspended state?
For E.G
I have EJB1 (Container Managed/Required) that starts transaction T1 and does some
work then calls another ejb EJB2 (Container Managed/NotSupported) which makes
a inter domain T3 call. Since EJB2 is configured with NotSupported transaction
attribute, transaction T1 is suspended for the time being while the business method
of EJB2 is executing.
The question is if I set <trans-timeout-seconds>10</trans-timeout-seconds> for
transactions started by EJB1, will it work? Looks like once a method on EJB2 is
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to execute, then transaction T1 waits untill that time despite having a transaction
time out of 10 seconds.
How can I exit out of the transaction T1 while its in suspened state if it takes
more that 10 seconds for EJB2 to complete its work?
Any suggestions are welcome and thx in advance.
Regards,
Dhilip.
Dhilip,
I had similar issue but in my case I got timeout exception once the transaction
of first bean resumed. It seeems the timeout clock keeps on ticking even when
the transaction is in suspended state.
Finally I increased the timeout value of first bean to execute the process.
-Ashish
"Dhilip" <[email protected]> wrote:
>
>All,
>
>Does the <trans-timeout-seconds>10</trans-timeout-seconds> in weblogic-ejb-jar.xml
>apply to transactions that are in a suspended state?
>
>For E.G
>I have EJB1 (Container Managed/Required) that starts transaction T1 and
>does some
>work then calls another ejb EJB2 (Container Managed/NotSupported) which
>makes
>a inter domain T3 call. Since EJB2 is configured with NotSupported transaction
>attribute, transaction T1 is suspended for the time being while the business
>method
>of EJB2 is executing.
>
>The question is if I set <trans-timeout-seconds>10</trans-timeout-seconds>
>for
>transactions started by EJB1, will it work? Looks like once a method
>on EJB2 is
>invoked, the transaction T1 is suspened and if the EJB2 method takes
>30 seconds
>to execute, then transaction T1 waits untill that time despite having
>a transaction
>time out of 10 seconds.
>
>How can I exit out of the transaction T1 while its in suspened state
>if it takes
>more that 10 seconds for EJB2 to complete its work?
>
>Any suggestions are welcome and thx in advance.
>
>Regards,
>Dhilip.
>
>
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Process: iPhoto [4099]
Path: /Applications/iPhoto.app/Contents/MacOS/iPhoto
Identifier: com.apple.iPhoto
Version: 9.2.1 (9.2.1)
Build Info: iPhotoProject-628000000000000~3
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Date/Time: 2012-02-29 23:38:09.389 -0500
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Report Version: 9
Interval Since Last Report: 55866 sec
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Per-App Interval Since Last Report: 586 sec
Per-App Crashes Since Last Report: 6
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Exception Codes: 0x0000000000000002, 0x0000000000000000
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1 libsystem_kernel.dylib 0x9a18d1f6 mach_msg + 70
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3 com.apple.CoreFoundation 0x9c553da4 __CFRunLoopRun + 1428
4 com.apple.CoreFoundation 0x9c55347c CFRunLoopRunSpecific + 332
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